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Acquisitions And Dispositions (Summary Of Fair Value Of DNI Intangible Assets Acquired And Weighted-Average Amortization Period) (Details) - DNI [Member]
$ in Thousands
12 Months Ended
Jun. 30, 2018
USD ($)
Customer Relationships [Member]  
Fair value as of acquisition date, finite lived intangible assets $ 97,255
Software And Unpatented Technology [Member]  
Fair value as of acquisition date, finite lived intangible assets $ 2,609
Weighted-average amortization period (in years) 5 years
Trademarks [Member]  
Fair value as of acquisition date, finite lived intangible assets $ 4,139
Weighted-average amortization period (in years) 5 years
Minimum [Member] | Customer Relationships [Member]  
Weighted-average amortization period (in years) 5 years
Maximum [Member] | Customer Relationships [Member]  
Weighted-average amortization period (in years) 15 years